Valve Spring Compressor - Ford 3V 4.6L or 5.4L engines Specialty Tool for a single camshaft swap or cylinder head work. This tool was only available through the manufacturer until now Comes with two feet; one for removing/installing followers and one for removing/installing the springs For use on Ford, Lincoln or Mercury vehicles equipped with the 3V 4.6L or 5.4L engines - Mustang, F-150, Super Duty F-250 F-350 F-450 F-550, Explorer, Mountaineer, Sport Trac, Expedition, Navigator .